Canada fell behind with 7:42 remaining when Ondrej Palat scored on an odd-man rush off a pass from Martin Necas. Mitch Marner (93) celebrates his overtime goal with teammate Macklin Celebrini as Canada rallied for a 4-3 comeback victory against Czechia in the quarterfinals of the Olympic men's hockey tournament. Robert Hradil/Getty ImagesThen Marner's backhanded goal 1:22 into OT put Canada into the semifinals Friday, where it could face Finland, Switzerland or Sweden. Even staying in the tournament, Canada has a major concern after losing Sidney Crosby to injury five minutes into the second period. A trainer applied an ice pack to the back of Slafkovsky's neck, and he held it on himself when he got up to celebrate a goal scored while he was getting medical attention.